In order to recognize the intersection feature effectively, a new feature recognition algorithm based on feature main base face was proposed. The model was processed, transition features was suppressed,outer contour was removed, feature processing surface was extracted, the extended attributed adjacent graph was generated,the faceedge relationship attribution between the feature surfaces was used to judge the parentchild relationships between the intersecting features.Through the size of the feature base degree,the features main base surface was selected and the convex edge were hints for adding virtual links,the virtual chain auxiliary surface was constructed,intersecting features were separated and the similarity of the features was judged. Through the adjacency matrix and the predefined feature library, feature matching was realized, so as to complete the intersection feature recognition.Finally, the algorithm was validated by a model with intersecting features.